This info is from Slimdevices.com "11 Mbps 802.11b and 54Mbps 802.11g are both supported. Both infrastructure and ad-hoc modes are supported, so you can connect to a wireless router, wireless access point, or even directly to a computer that has a wireless network interface."
So yes, you should be able to do it, try asking on the Slimdevices forum for more info.

Squeezebox Forum